/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.db.protocol.influxdb.function;

import org.apache.iotdb.db.mpp.plan.expression.Expression;
import org.apache.iotdb.db.mpp.plan.expression.leaf.TimeSeriesOperand;

import java.util.List;

public abstract class InfluxFunction {

    // contain possible parameters
    private List<Expression> expressionList;

    public InfluxFunction(List<Expression> expressionList) {
        this.expressionList = expressionList;
    }

    public InfluxFunction() {
    }

    public List<Expression> getExpressions() {
        return this.expressionList;
    }

    public String getParmaName() {
        if (expressionList == null) {
            throw new IllegalArgumentException("not support param");
        }
        TimeSeriesOperand parmaExpression = (TimeSeriesOperand) expressionList.get(0);
        return parmaExpression.getPath().getFullPath();
    }

    public abstract String getFunctionName();

    // calculate result by brute force
    public abstract InfluxFunctionValue calculateBruteForce();

    // calculate result by iotdb func
    public abstract InfluxFunctionValue calculateByIoTDBFunc();

    public abstract void updateValueIoTDBFunc(InfluxFunctionValue... functionValues);
}
